.page-title {
    text-align: center;
}

.question-info {
    text-align: center;
}

.user-info {
    display: flex;
    justify-content: space-between;
    color: #666;
}

.user-info img {
    width: 38px;
    height: 38px;
    border-radius: 3px;
}

.comment-group {
    list-style: none;
    padding-left: 0;
}

.username {
    margin-left: 10px;
}

.comment-content {
    margin-top: 20px;
    margin-left: 20px;
}